Whether it works or not I'm not sure, but people are tired of the same canned responses every time a tragedy like this happens.
The politicians get together, and say that their thoughts and prayers are with the victims and their families, and that this won't bring the city down because people are brave and strong, then they will carry on with their lives until the next attack.
I just want to see a domestic response that at least paints an image of security.
Build case files of everywhere these terrorists have been, find out how they got radicalized, and proverbially bust some heads. Make it clear that their type of rhetoric will not be tolerated.
Just make it look like you're doing something, put on a show.
Maybe gentrify some neighborhoods that are known to house a lot of people with extremist views.